Toothbrush



FIG. 1 is a perspective view of a toothbrush showing my new design;

FIG. 2 is a perspective view thereof from a different angle;

FIG. 3 is a top view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is an end view thereof;

FIG. 7 is an end view thereof of the end opposite that shown in FIG. 6. 

The ornamental design for a toothbrush, as shown. 